Building Control inspections will check works relating to the separately-issued consent to discharge domestic effluent, but will not check for compliance with planning approval conditions.
In ROI there is no independent system to check compliance with the building regulations, despite changes to the building control regulations over the years. Local authority building control officers do not inspect self-build sites, unless they decide to do a spot inspection (which is rare). It is up to them to assess which projects should be subject to risk based inspections as are supposed to be typically undertaken on at least 12 to 15 per cent of validly commenced building units, in line with its statutory function of monitoring building activity in general within its geographic area.
In ROI the self-builder must choose one of two self-certification routes: the opt in or opt out route. In either case you must pay the certifier’s professional fees, for which you will need to shop around. At the time of writing the fees for an engineer to oversee the construction for opt out was around the four thousand mark, including construction drawings and certification.
For opt in you are looking at 10 thousand plus, partly because of the administrative cost. The certifier, who is called an Assigned Certifier, will need to get ancillary certificates from the trades and suppliers for labour and materials and upload each on the Building Control Management System.